What are the potential issues if you forget to reset error handling after using `On Error Resume Next`?

Forgetting to reset error handling after using `On Error Resume Next` can lead to several subtle and hard-to-debug issues: 1. **Masked Errors:** Subsequent critical errors will be silently ignored. 2. **Unexpected Behavior:** Code might proceed with invalid data due to suppressed errors. 3. **Propagation:** Other procedures might inherit the `On Error Resume Next` state, causing widespread error suppression. 4. **Debugging Difficulty:** The debugger won't automatically break on errors, making it time-consuming to pinpoint root causes.